Speed-pulley



(No Model.)

W. M. MG-INTYRE.

vSPEED PUL'LEYi Patnt'ed Deo. 5'-

UNiTED STATES PATENT OFFICE.

SPEEDY-PULLr- Y-` SPECIFICATION forming part of Letters Patent o.510,283, dated December 5, 1893.

Application filed August 26,1893. Serial No. 484,137. (No model.)

To all whom t may con/cern:

Be it known that I, WILLIAM M. MCINTYRE,"

a citizen of the United States, and a resident of Wilkinsburg, in thecounty of Allegheny' and State of Pennsylvania, have invented certainnew and useful Improvements in Speed-Pulleys; andI do hereby declarethat the following is a full, clear, and exact description of theinvention, which will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

My invention relates to improvements in what are known as speed pulleys,by which varying rates of speed may be communicated with a given rate ofmotion of the shaft with which the pulley is connected.

The object of the invention is to provide an improved device of theabove character which shall possess superior advantages with respect toefficiency in operation.

The invention consists in the novel construction and combination ofparts hereinafter fully described and claimed.

In the accompanying drawings: Figure 1 is a side elevation showing twopulleys con-` structed in accordance with my invention, connectedtogether by a belt, and showing means for shifting the slidable parts ofthe pulleys. Fig. 2 is a similar view looking from the opposite side.Fig. 3 is a cross section on the line -os, Fig. 1. Fig. et is a detailperspective view of one of the pulleys and its shaft.

In the said drawings the reference numeral l designates a driving shaftformed with a number ot' equi-distant horizontal grooves 2. This shaftis journaled in the frame of a machine or in the standards or hangers,as may be required. In the present instance it is shown as having itsbearings in standards 3. Fixed to the shaft is a series of triangularshaped segments 4, with alternating spaces 5 which register with thegrooves in the shaft. Located in the grooves in the shaft are slides 5a,provided with similar segments 6. There are thus formed two cone-shapedparts, divided into sections, the cones pointing in opposite directions,and the segments of one fitting and slidable in the spaces between theother cone or part.

Located below the shaft l, is a similar shaft 7, having horizontalgrooves 8. Fixed to this shaft are segments 9, forming a cone similar tothat above described, and in the grooves in the shaft fit and workslides l0 provided with segments 12, arranged to slide in the spacesbetween the segments 9. The two pulleys above described are connected bya belt 13.

Oneend of each of the slides 5 and 9, is connected with or secured to astandard 14. This standard has apertures near each'end through which thesaid shafts pass and is horizontally slidable or movable thereon.Secured to this standard are guide rods 15, and a supporting bar 16,which pass through holes in one of the standards 3, and are connectedtogether by a bar 17. s

Pivoted to the machine frame or base 18, is a lever 19, providedintermediate of its ends with arms 20,.which embrace the belt 13. To theupper end of this lever is pivoted one end of a connecting bar 21, theother end of which is pivotally connected with the sliding standard 14.The outer ends of the movable segments are connected by a band 23.

The operation will be readily understood. When it is desired to vary thespeed of the driven pulley, the lever 19 is moved to the right or leftwhich will actuate the standard 14, which in turn will move theconescomprising the pulleys in or out. VSupposing for instance it is desiredto increase the speed of the driven pulley, the lever, Fig. 1, is turnedto the right, causing the standard 14, to, be moved outward or away fromthe cones, and the slides 10, to be correspondingly moved, therebyincreasing the circumference of the driving pulley. At the same time theslides of the lower pulley will be operated to decrease thecircumferenceof this pulley. To accomplish this object it is necessarythat the points of the sliding segments of one shaft should point in adirection opposite to the points of the segments of the other shaft. Bythis construction although the slides of both shafts move in the samedirection, yet the circumference of one-pulley will be increased whilethe other is decreased, and vice versa. As the slides areithus movedthe'belt will be correspondingly shifted by the arms on the lever, thebelt line being at the junction of the two cones composing each pulley.

While I have described the pulleys as being arranged in pairs, a singlepulley may be used if desired. In this case a drop or friction pulley isnecessary to keep the belt taut. I have also described the pulley asbeing composed of fixed and slidable segments, but it is obvious thatboth sets of said segments may be made slidable, if convenient ordesirable.

Having thus described my invention, what I claim is l. The combinationwith a shaft formed with a series'of horizontal grooves, and one seriesof segments secured to said shaft with spaces between aligned with thegrooves in the shaft, of the slides fitting in said grooves andprovidedwith another series of segments Working in` said spaces;substantially as described.

2. The combination with the shafts, having horizontal grooves therein,the segments fixed to said shafts, the oppositely arranged movablesegments, the slides fitting in said grooves with which said movablesegments are connected, forming upper and lower pulleys and the beltconnecting said pulleys, of the horizontal movable standard to whichsaid slides are secured, the guide rods and supporting bar, the lever,the shifting arms, and the connecting bar, substantially as described.

In testimony that I claim the foregoing as my own I have hereuntoafiixed my signature in presence of'tWo Witnesses. y

WILLIAM M. MCIN'FYRE.

Witnesses:

FRANK M. MAssENo, WM. G. STEWART.

